fix,feat: shared plugin cache dir is a no-op, only selected tests are tracked for fixture cleanup, hide debug output behind a flag

[kapilt]

closes #65
closes #62
closes #63

[codecov]

Codecov Report

Patch coverage: 75.67% and project coverage change: -1.37 ⚠️

Comparison is base (2c4e418) 92.81% compared to head (87a33fe) 91.44%.

❗ Current head 87a33fe differs from pull request most recent head 76d29f8. Consider uploading reports for the commit 76d29f8 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #66      +/-   ##
==========================================
- Coverage   92.81%   91.44%   -1.37%     
==========================================
  Files           8        8              
  Lines         473      491      +18     
==========================================
+ Hits          439      449      +10     
- Misses         34       42       +8     

Impacted Files	Coverage Δ
pytest_terraform/xdist.py	78.09% <45.45%> (-3.10%)	⬇️
pytest_terraform/tf.py	95.20% <85.71%> (-1.22%)	⬇️
pytest_terraform/plugin.py	96.96% <100.00%> (+0.09%)	⬆️

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